US3949697A - Marine fender assembly having a multistage shock-absorbing performance - Google Patents
Marine fender assembly having a multistage shock-absorbing performance Download PDFInfo
- Publication number
- US3949697A US3949697A US05/536,780 US53678074A US3949697A US 3949697 A US3949697 A US 3949697A US 53678074 A US53678074 A US 53678074A US 3949697 A US3949697 A US 3949697A
- Authority
- US
- United States
- Prior art keywords
- shock
- receiving member
- quay wall
- supporting members
- fender assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/422—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing the stressing resulting in flexion of the spring
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/26—Fenders
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Definitions
- the present invention relates to a marine fender assembly having a multistage shock-absorbing performance.
- marine fenders are used to absorb the berthing impact energy of a vessel when the vessel is berthed to a quay, a dolphin, a pier and the like (hereinafter simply referred to as quay wall), so as to protect the side board of the vessel during berthing and mooring of the vessel.
- An object of the present invention is to solve the above mentioned drawback and to provide a marine fender assembly developing an effective shock-absorbing performance in response to a size of a vessel during berthing and morring thereof.
- an improved multistage shock-absorbing performance can be achieved in response to the size of the berthing vessel with the use of the single marine fender assembly.
- the present invention consists in a marine fender assembly comprising a first shock-receiving member facing to a side board of a vessel; a pair of first supporting members integrally formed with said first shock-receiving member, said first supporting members extending from said first shock-receiving member toward a quay wall while slightly diverging from each other and forming an inverted U-shape cross-section with said first shock-receiving member; second and third shock-receiving members extending outwardly from said first supporting members at different levels, respectively; and second and third supporting members integrally formed with said second and third shock-receiving members, said second and third supporting members extending from said second and third shock-receiving members toward said quay wall while slightly diverging from each other, respectively, all of said supporting members being in contact with said quay wall and each of said second and third supporting members being provided at its end with a mounting flange for securing said marine fender assembly to said quay wall.
- FIG. 1 is a perspective view of an embodiment of the marine fender assembly according to the present invention.
- FIG. 2 is a graph showing a relation between deflection and reactive force in energy absorption by the marine fender assembly according to the present invention.
- the marine fender assembly of the present invention is based on a trapezoidal cross-section widely adopted to the conventional fenders and made of elastomer such as natural and synthetic rubbers. That is, the marine fender assembly comprises a first shock-receiving member 1 facing to a side board of a vessel and a pair of first supporting members 2 and 3 integrally formed with the first shock-receiving member 1 as shown in FIG. 1. These first supporting members 2 and 3 extend from the first shock-receiving member 1 toward a quay wall while slightly diverging from each other and form an inverted U-shape cross-section with the first shock-receiving member 1. As shown in FIG. 1, the shock receiving member 1 has a substantially flat face projected in a plane substantially parallel to the quay wall.
- This first supporting members 2 and 3 are in contact with the quay wall at the ends thereof. On these ends are provided rugged portions 11 as shown in FIG. 1 in order to prevent slipping along the surface of the quay wall. If desired, these ends may be received in grooves provided on the quay wall.
- the supporting member 2 provides with a second shock-receiving member 4 extending outwardly from the supporting member 2 and a second supporting member 5 integrally formed with the second shock-receiving member 4 and forms an inclined and inverted U-shape cross-section with these second members 4 and 5.
- the supporting member 3 provides with a third shock-receiving member 6 extending outwardly from the supporting member 3 at a level lower than that of the second shock-receiving member 4 and a third supporting member 7 integrally formed with the third shock-receiving member 6 and forms an inclined and inverted U-shape cross-section with these third members 6 and 7.
- Each of the second and third supporting members 5 and 7 extends toward the quay wall while slightly diverging from each other.
- Each of the second and third supporting members 5 and 7 is provided at its end with mounting flanges 8 and 9 in the same plane as the ends of the supporting members 2 and 3, whereby the marine fender assembly is mounted on the quay wall.
- core bars 10 are embedded in the mounting flanges 8 and 9, respectively, according to the common technique adaptable for trapezoidal fenders, and also washer seats 11 are provided on the outer surfaces of the mounting flanges 8 and 9 in positions.
- the marine fender assembly of the present invention is secured to the quay wall through the mounting flanges 8 and 9 by means of anchor bolts (not shown).
- the side board of the boat When a small boat is berthed and moored to the quay wall, the side board of the boat firstly contacts with the first shock-receiving member 1, during which a reactive force in response to the small boat is caused under an elastic deformation of the first supporting members 2 and 3. As a result, a satisfactory energy absorption is effected in a region a shown in FIG. 2 through the gradual increases of the reactive force.
- the second shock-receiving member 4 serves to hold the momentum in response to the middle-sized ship through the elastic deformation of the first shock-receiving member 1 and produces an appropriately medium reactive force and as a result, a satisfactory energy absorption in response to the berthing shock of the ship is effected in a region b shown in FIG. 2.
- the third shock-receiving member 6 finally contacts with the side board of the vessel through the deformations of the first and second shock-receiving members 1 and 4 and as a result, a satisfactory energy absorption in response to the berthing shock of the vessel is effected in a region c shown in FIG. 2 under a high reactive force.
- the energy absorption as shown in FIG. 2 can be obtained by the marine fender assembly of the present invention in response to the size of the berthing vessel under the reactive force adapted to the size of the vessel.
- a typical dimension of the marine fender assembly of the present invention will be given as follows.
- these heights H 1 , H 2 and H 3 should preferably satisfy the following relations.
- the widths W 1 , W 2 and W 3 of the shock-receiving members 1, 4 and 6 are preferably selected from the range (0.4 to 0.8) ⁇ H 1 , respectively.
- the thicknesses T 1 , T 2 and T 3 of the shock-receiving members 1, 4, 6 are preferably selected from the range (0.1 to 0.4) ⁇ H 1 and the relation of T 1 ⁇ T 2 ⁇ T 3 , respectively.
- the marine fender assemblies worked relating to the length of the vessel cooperates with each other so as to provide an effective energy absorption in response to the size of the vessel.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Vibration Dampers (AREA)
- Revetment (AREA)
Abstract
A marine fender assembly comprises first, second and third shock-receiving members and first, second and third supporting members integrally formed therewith and has an excellent multistage shock-absorbing performance.
Description
The present invention relates to a marine fender assembly having a multistage shock-absorbing performance.
In general, marine fenders are used to absorb the berthing impact energy of a vessel when the vessel is berthed to a quay, a dolphin, a pier and the like (hereinafter simply referred to as quay wall), so as to protect the side board of the vessel during berthing and mooring of the vessel.
However, since various kinds of vessels having different sizes are berthed to the quay wall, it is impossible to provide a sufficient shock-absorbing performance in response to the size of the vessel by means of single marine fender.
An object of the present invention is to solve the above mentioned drawback and to provide a marine fender assembly developing an effective shock-absorbing performance in response to a size of a vessel during berthing and morring thereof.
According to the present invention, an improved multistage shock-absorbing performance can be achieved in response to the size of the berthing vessel with the use of the single marine fender assembly.
Namely, the present invention consists in a marine fender assembly comprising a first shock-receiving member facing to a side board of a vessel; a pair of first supporting members integrally formed with said first shock-receiving member, said first supporting members extending from said first shock-receiving member toward a quay wall while slightly diverging from each other and forming an inverted U-shape cross-section with said first shock-receiving member; second and third shock-receiving members extending outwardly from said first supporting members at different levels, respectively; and second and third supporting members integrally formed with said second and third shock-receiving members, said second and third supporting members extending from said second and third shock-receiving members toward said quay wall while slightly diverging from each other, respectively, all of said supporting members being in contact with said quay wall and each of said second and third supporting members being provided at its end with a mounting flange for securing said marine fender assembly to said quay wall.
For a better understanding of the invention, reference is made to the accompanying drawings, in which:
FIG. 1 is a perspective view of an embodiment of the marine fender assembly according to the present invention; and
FIG. 2 is a graph showing a relation between deflection and reactive force in energy absorption by the marine fender assembly according to the present invention.
The marine fender assembly of the present invention is based on a trapezoidal cross-section widely adopted to the conventional fenders and made of elastomer such as natural and synthetic rubbers. That is, the marine fender assembly comprises a first shock-receiving member 1 facing to a side board of a vessel and a pair of first supporting members 2 and 3 integrally formed with the first shock-receiving member 1 as shown in FIG. 1. These first supporting members 2 and 3 extend from the first shock-receiving member 1 toward a quay wall while slightly diverging from each other and form an inverted U-shape cross-section with the first shock-receiving member 1. As shown in FIG. 1, the shock receiving member 1 has a substantially flat face projected in a plane substantially parallel to the quay wall.
This first supporting members 2 and 3 are in contact with the quay wall at the ends thereof. On these ends are provided rugged portions 11 as shown in FIG. 1 in order to prevent slipping along the surface of the quay wall. If desired, these ends may be received in grooves provided on the quay wall.
The supporting member 2 provides with a second shock-receiving member 4 extending outwardly from the supporting member 2 and a second supporting member 5 integrally formed with the second shock-receiving member 4 and forms an inclined and inverted U-shape cross-section with these second members 4 and 5.
The supporting member 3 provides with a third shock-receiving member 6 extending outwardly from the supporting member 3 at a level lower than that of the second shock-receiving member 4 and a third supporting member 7 integrally formed with the third shock-receiving member 6 and forms an inclined and inverted U-shape cross-section with these third members 6 and 7.
Each of the second and third supporting members 5 and 7 extends toward the quay wall while slightly diverging from each other. Each of the second and third supporting members 5 and 7 is provided at its end with mounting flanges 8 and 9 in the same plane as the ends of the supporting members 2 and 3, whereby the marine fender assembly is mounted on the quay wall.
In order to ensure such mounting, core bars 10 are embedded in the mounting flanges 8 and 9, respectively, according to the common technique adaptable for trapezoidal fenders, and also washer seats 11 are provided on the outer surfaces of the mounting flanges 8 and 9 in positions.
The invention will be explained in detail with reference to the following example.
The marine fender assembly of the present invention is secured to the quay wall through the mounting flanges 8 and 9 by means of anchor bolts (not shown).
When a small boat is berthed and moored to the quay wall, the side board of the boat firstly contacts with the first shock-receiving member 1, during which a reactive force in response to the small boat is caused under an elastic deformation of the first supporting members 2 and 3. As a result, a satisfactory energy absorption is effected in a region a shown in FIG. 2 through the gradual increases of the reactive force.
Similarly, when a middle-sized ship is berthed and moored to the quay wall, the second shock-receiving member 4 serves to hold the momentum in response to the middle-sized ship through the elastic deformation of the first shock-receiving member 1 and produces an appropriately medium reactive force and as a result, a satisfactory energy absorption in response to the berthing shock of the ship is effected in a region b shown in FIG. 2.
Furthermore, when a large vessel is berthed and moored to the quay wall, the third shock-receiving member 6 finally contacts with the side board of the vessel through the deformations of the first and second shock-receiving members 1 and 4 and as a result, a satisfactory energy absorption in response to the berthing shock of the vessel is effected in a region c shown in FIG. 2 under a high reactive force.
Thus, the energy absorption as shown in FIG. 2 can be obtained by the marine fender assembly of the present invention in response to the size of the berthing vessel under the reactive force adapted to the size of the vessel.
A typical dimension of the marine fender assembly of the present invention will be given as follows.
______________________________________
A(mm) B(mm)
Height from the quay wall to the
first shock-receiving member 1 (H.sub.1)
250 500
Height from the quay wall to the
second shock-receiving member 4 (H.sub.2)
200 400
Height from the quay wall to the
third shock-receiving member 6 (H.sub.3)
150 300
______________________________________
In general, these heights H1, H2 and H3 should preferably satisfy the following relations.
H2 = (0.7 to 0.9) × H1
H3 = (0.5 to 0.7) × H1
The widths W1, W2 and W3 of the shock-receiving members 1, 4 and 6 are preferably selected from the range (0.4 to 0.8) × H1, respectively.
The thicknesses T1, T2 and T3 of the shock-receiving members 1, 4, 6 are preferably selected from the range (0.1 to 0.4) × H1 and the relation of T1 ≦T2 ≦T3, respectively.
Moreover, the thicknesses t1, t2, t3 and t4 of the supporting members 2, 3, 5 and 7 are preferably selected from the range (0.1 to 0.4) × H1 and relation of t1 =t2 ≦t3 ≦t4, respectively.
According to the present invention, even if various kinds of vessels are berthed to the quay wall, the marine fender assemblies worked relating to the length of the vessel cooperates with each other so as to provide an effective energy absorption in response to the size of the vessel.
Claims (3)
1. A marine fender assembly having a multistage shock-absorbing performance for mounting on a stationary object such as a quay wall, comprising a first shock-receiving member having a substantially flat face in a plane substantially parallel to said wall and facing a side board of a vessel; a pair of first supporting members integrally formed with said first shock-receiving member, said first supporting members extending from said first shock-receiving member toward said quay wall while slightly diverging from each other and forming an inverted U-shape cross-section with said first shock-receiving member; second and third shock-receiving members extending outwardly from said first supporting members at different levels, respectively, each of said levels substantially parallel to said wall; and second and third supporting members integrally formed with said second and third shock-receiving members, said second and third supporting members extending from said second and third shock-receiving members toward said quay wall while slightly diverging from each other, respectively, all of said supporting members being in contact with said quay wall and each of said second and third supporting members being provided at its end with a mounting flange for securing said marine fender assembly to said quay wall.
2. A marine fender assembly as claimed in claim 1 wherein said marine fender assembly satisfies the following conditions; i.e.
H2 = (0.7 to 0.9) × H1, and
H3 = (0.5 to 0.7) × H1
wherein H1 is a height from said quay wall to said first shock-receiving member, H2 is a height from said quay wall to said second shock-receiving member and H3 is a height from said quay wall to said third shock-receiving member.
3. A marine fender assembly as claimed in claim 2 and further satisfying the following three conditions; i.e.
1. W1, W2 and W3 = (0.4 to 0.8) × H1,
2. t1, t2 and T3 = (0.1 to 0.4) × H1, and T1 ≦T2 ≦T3,
3. t1, t2 t3 and t4 = (0.1 to 0.4) × H1, and t1 = t2 ≦ t3 ≦ t4
wherein H1 is a height from said quay wall to said first shock-receiving member, W1, W2 and W3 are widths of said first, second and third shock-receiving members, respectively, T1, T2 and T3 are thicknesses of said first, second and third shock-receiving members, respectively, and t1, t2, t3 and t4 are thicknesses of said first, second and third supporting members, respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JA49-1363 | 1973-12-28 | ||
| JP741363A JPS5123797B2 (en) | 1973-12-28 | 1973-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3949697A true US3949697A (en) | 1976-04-13 |
Family
ID=11499401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/536,780 Expired - Lifetime US3949697A (en) | 1973-12-28 | 1974-12-27 | Marine fender assembly having a multistage shock-absorbing performance |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3949697A (en) |
| JP (1) | JPS5123797B2 (en) |
| AU (1) | AU466666B2 (en) |
| GB (1) | GB1486630A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074649A (en) * | 1977-05-04 | 1978-02-21 | Stranahan Robert L | Ice barrier for boats |
| US4113295A (en) * | 1976-12-22 | 1978-09-12 | Protective Treatments, Inc. | Longitudinally curved impact resistant trim strips |
| US4756266A (en) * | 1984-05-10 | 1988-07-12 | Sumitomo Rubber Industries, Ltd. | Elastically deformable fender |
| US5031564A (en) * | 1989-12-14 | 1991-07-16 | Beckerer Frank S Jr | Snubber strip |
| US20070228747A1 (en) * | 2006-03-29 | 2007-10-04 | Aisin Seiki Kabushiki Kaisha | Bumper device for vehicle |
| US20080203743A1 (en) * | 2004-11-03 | 2008-08-28 | Nv Bekaert Sa | Impact Absorbing Device with Tape-Like Device Attached |
| CN102632974A (en) * | 2011-02-08 | 2012-08-15 | 株式会社普利司通 | Marine fender |
| CN104024057A (en) * | 2011-11-03 | 2014-09-03 | 沙特基础创新塑料Ip私人有限责任公司 | Energy absorbing system for conflicting regulatory requirements for vehicle bumpers |
| EP2818400A1 (en) | 2013-05-31 | 2014-12-31 | All Maritime Solutions CVBA | Marine fender |
| DE102014007666A1 (en) * | 2014-05-27 | 2015-12-03 | Marina Winningen Mosel GmbH | Device for protecting watercraft outer walls |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701647A (en) * | 1982-02-25 | 1987-10-20 | Fmc Corporation | Electromagnetic vibratory exciter |
| AU576543B2 (en) * | 1984-03-08 | 1988-09-01 | Fmc Corporation | Electromagnetic vibratory exciter |
| JPH0510023Y2 (en) * | 1987-06-10 | 1993-03-11 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2910033A (en) * | 1956-05-31 | 1959-10-27 | Aaron J R Weisburg | Gunnel guard |
| US3335689A (en) * | 1965-05-11 | 1967-08-15 | Gen Tire & Rubber Co | Low friction dock bumper |
| US3687502A (en) * | 1970-06-08 | 1972-08-29 | Standard Products Co | Bump-protection molding |
-
1973
- 1973-12-28 JP JP741363A patent/JPS5123797B2/ja not_active Expired
-
1974
- 1974-12-24 AU AU76881/74A patent/AU466666B2/en not_active Expired
- 1974-12-24 GB GB55736/74A patent/GB1486630A/en not_active Expired
- 1974-12-27 US US05/536,780 patent/US3949697A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2910033A (en) * | 1956-05-31 | 1959-10-27 | Aaron J R Weisburg | Gunnel guard |
| US3335689A (en) * | 1965-05-11 | 1967-08-15 | Gen Tire & Rubber Co | Low friction dock bumper |
| US3687502A (en) * | 1970-06-08 | 1972-08-29 | Standard Products Co | Bump-protection molding |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113295A (en) * | 1976-12-22 | 1978-09-12 | Protective Treatments, Inc. | Longitudinally curved impact resistant trim strips |
| US4074649A (en) * | 1977-05-04 | 1978-02-21 | Stranahan Robert L | Ice barrier for boats |
| US4756266A (en) * | 1984-05-10 | 1988-07-12 | Sumitomo Rubber Industries, Ltd. | Elastically deformable fender |
| US5031564A (en) * | 1989-12-14 | 1991-07-16 | Beckerer Frank S Jr | Snubber strip |
| US20080203743A1 (en) * | 2004-11-03 | 2008-08-28 | Nv Bekaert Sa | Impact Absorbing Device with Tape-Like Device Attached |
| US7543865B2 (en) * | 2006-03-29 | 2009-06-09 | Aisin Seiki Kabushiki Kaisha | Bumper device for vehicle |
| US20070228747A1 (en) * | 2006-03-29 | 2007-10-04 | Aisin Seiki Kabushiki Kaisha | Bumper device for vehicle |
| CN102632974A (en) * | 2011-02-08 | 2012-08-15 | 株式会社普利司通 | Marine fender |
| CN102632974B (en) * | 2011-02-08 | 2014-12-03 | 株式会社普利司通 | Marine fender |
| CN104024057A (en) * | 2011-11-03 | 2014-09-03 | 沙特基础创新塑料Ip私人有限责任公司 | Energy absorbing system for conflicting regulatory requirements for vehicle bumpers |
| KR101868011B1 (en) * | 2011-11-03 | 2018-06-15 | 사빅 글로벌 테크놀러지스 비.브이. | Energy absorbing system for conflicting regulatory requirements for vehicle bumpers |
| US10005408B2 (en) * | 2011-11-03 | 2018-06-26 | Sabic Global Technologies B.V. | Energy absorbing system for conflicting regulatory requirements for vehicle bumpers |
| EP2818400A1 (en) | 2013-05-31 | 2014-12-31 | All Maritime Solutions CVBA | Marine fender |
| DE102014007666A1 (en) * | 2014-05-27 | 2015-12-03 | Marina Winningen Mosel GmbH | Device for protecting watercraft outer walls |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5123797B2 (en) | 1976-07-19 |
| DE2461687B2 (en) | 1976-06-16 |
| GB1486630A (en) | 1977-09-21 |
| AU7688174A (en) | 1975-11-06 |
| AU466666B2 (en) | 1975-11-06 |
| JPS5097093A (en) | 1975-08-01 |
| DE2461687A1 (en) | 1975-07-03 |
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